2 Syllables: SU
blushes, brushes, Burgess, burnished, buses, buttons, churches, Church's, churlish, circus, clutches, cometh, comings, courage, courteous, cousins, coverage, crushes, crutches, Cummings, curses, Curtis, customs, cuttings, dozens, earliest, earnest, Ernest, firmest, firmness, flourish, furnace, furnish, furthest, furtive, girlish, judges, kerchief, loveth, luggage, merges, nervous, nothings, nourish, nurses, ovens, perches, Perseus, Prussians, purchase, purges, purplish, purpose, purses, rushes, Russians, Russia's, scourges, searches, service, skirmish, spurious, sternest, sternness, stirrings, sufferings, suffrage, summons, surface, surges, surplus, tonnage, touches, Turkish, uplands, urges, verses, versus, worketh, worthiest, worthless
3 Syllables: SUU
3 Syllables: USU
alertness, assertive, coercive, discourage, discursive, discusses, discussions, encouraged, impervious, luxurious, researches, reverses, subversive, traverses
4 Syllables: UUSU
Found 98 words across 4 groupings. Skipped 10 excess words of a similar stem.